EP0810022A1 - Dispositif et procédé pour la purification des gaz chargés de poussières d'aluminium - Google Patents
Dispositif et procédé pour la purification des gaz chargés de poussières d'aluminium Download PDFInfo
- Publication number
- EP0810022A1 EP0810022A1 EP97107991A EP97107991A EP0810022A1 EP 0810022 A1 EP0810022 A1 EP 0810022A1 EP 97107991 A EP97107991 A EP 97107991A EP 97107991 A EP97107991 A EP 97107991A EP 0810022 A1 EP0810022 A1 EP 0810022A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- exhaust air
- dust
- reaction
- aluminate
- solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/40—Combinations of devices covered by groups B01D45/00 and B01D47/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
Definitions
- the invention relates to a method and a device for cleaning aluminum dust-containing exhaust air, in which aluminum dust-containing exhaust air is treated in a dust washer with one or more exhaust air inlets 1, one or more exhaust air outlets 2 and a collecting basin 3 for the washing solution, and the washing suspension that forms from the exhaust air is separated.
- wash separators Such devices are known in various forms as so-called “wet separators". The resulting wash suspensions must be cleaned and disposed of.
- the dusts arising from metal processing have been increasingly extracted and later separated from the exhaust air.
- the wet scrubbers used here can in principle be used for cleaning and separating aluminum dust, but the resulting aluminum suspension has an increased reaction potential, so that a subsequent chemical reaction with sudden release of hydrogen cannot be ruled out.
- the object is achieved by features specified in the claims. It has been shown that the aluminum dust contained in the exhaust gas can be converted to sodium aluminate by adding a washing liquid containing sodium. The reaction occurs spontaneously, with the hydrogen that is formed being extracted via the exhaust air system.
- the range limit of the pH was determined as an essential process parameter. To control the pH, sodium hydroxide solution is used in excess and, if necessary, replenished. At pH values above 11, fresh water may be added to compensate for evaporation losses.
- a high exhaust air flow rate is also necessary to keep the hydrogen gas concentration below 4 vol.% In the exhaust gas.
- the extracted air loaded with brush dust and other abrasion, possibly also chips, enters a dust washer 24, at the upper end of which a clean air duct 25 and at the lower end of which a collecting basin 26 is arranged.
- the resulting aluminate solution is removed from the system via line 27.
- Figure 2 shows an enlarged view of the reaction vessel 24 with the exhaust air inlet 28, which leads the raw gas part loaded with aluminum dust from line 23 into the reaction zone.
- the complete control system for controlling the temperature and concentration in the reaction area is shown in FIG. 3.
- the exhaust air quantities reaching the reaction zone via the exhaust air lines 1a, 1b are recorded by measuring devices 13, 14.
- the dust-containing exhaust gases then reach the area of spray devices 4a, 4b, which bring sodium-containing solutions into contact with the exhaust gas.
- sodium hydroxide solution reacts with the aluminum dust, so that 5 sodium aluminate is formed in the reaction vessel.
- the sodium aluminate solution is removed from the exhaust gas via droplet separators 11 and fed back to the process basin 3 in the lower section 6 of the reaction container 5.
- the clean gas leaves the reaction vessel 5 at the upper section 7 of the reaction zone, the flow rate being controllable by a fan 8.
- Measuring devices 10 for determining the pH are located in the lower part 6 of the reaction container. By adding fresh sodium hydroxide solution or water, the range limits for the pH value can be precisely observed.
- Part of the washing liquid containing sodium hydroxide solution is passed to the spray devices 4a, 4b via the circulation pumps 15, 16.
- the unneeded sodium aluminate solution can be used directly for processing.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Separation Of Particles Using Liquids (AREA)
- Gas Separation By Absorption (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Electrostatic Separation (AREA)
- Prevention Of Fouling (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19621238A DE19621238A1 (de) | 1996-05-25 | 1996-05-25 | Verfahren und Vorrichtung zur Reinigung von aluminiumstaubhaltiger Abluft |
DE19621238 | 1996-05-25 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0810022A1 true EP0810022A1 (fr) | 1997-12-03 |
EP0810022B1 EP0810022B1 (fr) | 2000-08-23 |
Family
ID=7795396
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97107991A Expired - Lifetime EP0810022B1 (fr) | 1996-05-25 | 1997-05-16 | Dispositif et procédé pour la purification des gaz chargés de poussières d'aluminium |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0810022B1 (fr) |
AT (1) | ATE195669T1 (fr) |
DE (2) | DE19621238A1 (fr) |
DK (1) | DK0810022T3 (fr) |
ES (1) | ES2151206T3 (fr) |
GR (1) | GR3034677T3 (fr) |
PT (1) | PT810022E (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19911119A1 (de) * | 1999-03-12 | 2000-09-14 | Ytong Ag | Vorrichtung und Verfahren zum Dosieren von Stäube freisetzendem Material |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004024850B4 (de) * | 2004-05-19 | 2010-12-02 | Bayerisches Institut für angewandte Umweltforschung und -technik BIfA GmbH | Verfahren und Vorrichtung zur Unschädlichmachung von mit zu gefährlicher Gasbildung führenden Stoffen beladenen Trägerbauelementen |
CN108714483B (zh) * | 2018-06-01 | 2024-04-30 | 上海汉邦联航激光科技有限公司 | 电选机混合铝灰颗粒的循环处理装置 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2126235A1 (de) * | 1971-05-17 | 1972-12-14 | Nalco Chemical Co | Verfahren zur kontinuierlichen Herstellung von Aluminiumoxid |
US3989488A (en) * | 1975-03-17 | 1976-11-02 | Wisting Walter L | Multi-stage air scrubbing unit |
EP0177998A1 (fr) * | 1984-09-12 | 1986-04-16 | Stamicarbon B.V. | Procédé pour éliminer des particules d'un milieu gazeux |
CS140086A1 (en) * | 1986-02-28 | 1987-09-17 | Jaroslav Ing Sigmund | Zpusob odlucovani hlinikoveho prachu z odsavaneho vzduchu pri metalizaci kovu hlinikem |
CN1056161A (zh) * | 1991-05-15 | 1991-11-13 | 长沙汽车电器厂 | 熔铝炉消烟除尘方法及其设备 |
EP0486759A1 (fr) * | 1990-11-23 | 1992-05-27 | ERE Emmer Recycling und Entsorgung GmbH | Procédé et dispositif de traitement ultérieur et purification des gaz d'échappement formés dans une fonderie d'aluminium secondaire |
EP0576416A1 (fr) * | 1992-06-17 | 1993-12-29 | Waagner-Biro Aktiengesellschaft | Procédé de production de l'aluminium |
-
1996
- 1996-05-25 DE DE19621238A patent/DE19621238A1/de not_active Withdrawn
-
1997
- 1997-05-16 EP EP97107991A patent/EP0810022B1/fr not_active Expired - Lifetime
- 1997-05-16 ES ES97107991T patent/ES2151206T3/es not_active Expired - Lifetime
- 1997-05-16 DK DK97107991T patent/DK0810022T3/da active
- 1997-05-16 AT AT97107991T patent/ATE195669T1/de not_active IP Right Cessation
- 1997-05-16 DE DE59702228T patent/DE59702228D1/de not_active Expired - Lifetime
- 1997-05-16 PT PT97107991T patent/PT810022E/pt unknown
-
2000
- 2000-10-26 GR GR20000402364T patent/GR3034677T3/el unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2126235A1 (de) * | 1971-05-17 | 1972-12-14 | Nalco Chemical Co | Verfahren zur kontinuierlichen Herstellung von Aluminiumoxid |
US3989488A (en) * | 1975-03-17 | 1976-11-02 | Wisting Walter L | Multi-stage air scrubbing unit |
EP0177998A1 (fr) * | 1984-09-12 | 1986-04-16 | Stamicarbon B.V. | Procédé pour éliminer des particules d'un milieu gazeux |
CS140086A1 (en) * | 1986-02-28 | 1987-09-17 | Jaroslav Ing Sigmund | Zpusob odlucovani hlinikoveho prachu z odsavaneho vzduchu pri metalizaci kovu hlinikem |
EP0486759A1 (fr) * | 1990-11-23 | 1992-05-27 | ERE Emmer Recycling und Entsorgung GmbH | Procédé et dispositif de traitement ultérieur et purification des gaz d'échappement formés dans une fonderie d'aluminium secondaire |
CN1056161A (zh) * | 1991-05-15 | 1991-11-13 | 长沙汽车电器厂 | 熔铝炉消烟除尘方法及其设备 |
EP0576416A1 (fr) * | 1992-06-17 | 1993-12-29 | Waagner-Biro Aktiengesellschaft | Procédé de production de l'aluminium |
Non-Patent Citations (1)
Title |
---|
DATABASE WPI Week 8742, Derwent World Patents Index; AN 87-292245, XP002038442, SIGMUND: "Aluminium coating equipment -has alkali bath for capturing waste aluminium powder." * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19911119A1 (de) * | 1999-03-12 | 2000-09-14 | Ytong Ag | Vorrichtung und Verfahren zum Dosieren von Stäube freisetzendem Material |
NL1014615C2 (nl) * | 1999-03-12 | 2002-05-29 | Ytong Ag | Inrichting en werkwijze voor het doseren van stof vrijgevend materiaal. |
Also Published As
Publication number | Publication date |
---|---|
PT810022E (pt) | 2001-02-28 |
DE19621238A1 (de) | 1997-11-27 |
ATE195669T1 (de) | 2000-09-15 |
ES2151206T3 (es) | 2000-12-16 |
DK0810022T3 (da) | 2000-11-27 |
DE59702228D1 (de) | 2000-09-28 |
GR3034677T3 (en) | 2001-01-31 |
EP0810022B1 (fr) | 2000-08-23 |
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